Any novel that is removed from reality--especially those novels set in nonexistent worlds, such as an elvish kingdom, on the moon, in Pellucidar (the hollow center of the earth), or in alternative ver [..]

Any novel that is disengaged from reality. Often such novels are set in nonexistent worlds, such as under the earth, in a fairyland, on the moon, etc. The characters are often something other than human or include nonhuman characters. Example: J. R. R. Tolkien, The Hobbit